Stop showing notifications if they're ignored

chrome/browser/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/chrome_build.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//build/split_static_library.gni")
 import("//chrome/common/features.gni")
@@ skipping 730 matching lines @@
     "ntp_snippets/bookmark_last_visit_updater.cc",
     "ntp_snippets/bookmark_last_visit_updater.h",
     "ntp_snippets/content_suggestions_notifier_service_factory.cc",
     "ntp_snippets/content_suggestions_notifier_service_factory.h",
     "ntp_snippets/content_suggestions_service_factory.cc",
     "ntp_snippets/content_suggestions_service_factory.h",
     "ntp_snippets/download_suggestions_provider.cc",
     "ntp_snippets/download_suggestions_provider.h",
     "ntp_snippets/ntp_snippets_features.cc",
     "ntp_snippets/ntp_snippets_features.h",
+    "ntp_snippets/ntp_snippets_metrics.cc",
+    "ntp_snippets/ntp_snippets_metrics.h",
+    "ntp_snippets/ntp_snippets_prefs.cc",
+    "ntp_snippets/ntp_snippets_prefs.h",
     "ntp_tiles/chrome_most_visited_sites_factory.cc",
     "ntp_tiles/chrome_most_visited_sites_factory.h",
     "ntp_tiles/chrome_popular_sites_factory.cc",
     "ntp_tiles/chrome_popular_sites_factory.h",
     "page_load_metrics/browser_page_track_decider.cc",
     "page_load_metrics/browser_page_track_decider.h",
     "page_load_metrics/metrics_navigation_throttle.cc",
     "page_load_metrics/metrics_navigation_throttle.h",
     "page_load_metrics/metrics_web_contents_observer.cc",
     "page_load_metrics/metrics_web_contents_observer.h",
@@ skipping 3722 matching lines @@
       "media/pepper_cdm_test_constants.cc",
       "media/pepper_cdm_test_constants.h",
     ]
   }
 }
 
 service_manifest("preferences_manifest") {
   name = "preferences"
   source = "prefs/preferences_manifest.json"
 }